Esther Stevenson
The Stevenson family resided in Philadelphia for a couple years before coming West. Lucy Stevenson, is mentioned in the Terry account, confirming that the family traveled in the Hofheins company. (Terry was actually in the Hart Company, but the Hart company consisted of individuals from St. Louis and the Hart and Hofheins companies traveled together for a large part of the journey.)
Her surname is "Grange" on the death certificate and Find A Grave website.
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Esther Stevenson (1848 - 1918) Profile